﻿using FreeSql.DataAnnotations;
using FreeSql.Internal;
using FreeSql.Internal.Model;
using FreeSql.Provider.TDengine.Attributes;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace FreeSql.TDengine.Curd
{
    class TDengineInsert<T1> : Internal.CommonProvider.InsertProvider<T1> where T1 : class
    {
        public TDengineInsert(IFreeSql orm, CommonUtils commonUtils, CommonExpression commonExpression)
            : base(orm, commonUtils, commonExpression)
        {
        }

        internal bool InternalIsIgnoreInto = false;
        internal IFreeSql InternalOrm => _orm;
        internal TableInfo InternalTable => _table;
        internal DbParameter[] InternalParams => _params;
        internal DbConnection InternalConnection => _connection;
        internal DbTransaction InternalTransaction => _transaction;
        internal CommonUtils InternalCommonUtils => _commonUtils;
        internal CommonExpression InternalCommonExpression => _commonExpression;
        internal List<T1> InternalSource => _source;
        internal Dictionary<string, bool> InternalIgnore => _ignore;
        internal void InternalClearData() => ClearData();

        public override int ExecuteAffrows() => base.SplitExecuteAffrows(
            _batchValuesLimit > 0 ? _batchValuesLimit : 5000, _batchParameterLimit > 0 ? _batchParameterLimit : 3000);

        public override long ExecuteIdentity() => base.SplitExecuteIdentity(
            _batchValuesLimit > 0 ? _batchValuesLimit : 5000, _batchParameterLimit > 0 ? _batchParameterLimit : 3000);

        public override List<T1> ExecuteInserted() => base.SplitExecuteInserted(
            _batchValuesLimit > 0 ? _batchValuesLimit : 5000, _batchParameterLimit > 0 ? _batchParameterLimit : 3000);


        public override string ToSql()
        {
            //处理Insert忽略Tag
            var ignoreColumnList = _ignoreInsertColumns.GetOrAdd(typeof(T1), s =>
            {
                //如果是超表不处理
                if (!s.IsDefined(typeof(TDengineSubTableAttribute))) return new List<string>(0);
                var tableByEntity = _commonUtils.GetTableByEntity(s);
                var keyValuePairs = tableByEntity.Properties.Where(pair =>
                    pair.Value.GetCustomAttribute<TDengineTagAttribute>() != null);
                return keyValuePairs.Select(keyValuePair => keyValuePair.Value.Name).ToList();
            });
            if (InternalIsIgnoreInto == false) return base.ToSqlValuesOrSelectUnionAll(ignoreColumn: ignoreColumnList);
            var sql = base.ToSqlValuesOrSelectUnionAll(ignoreColumn: ignoreColumnList);
            return $"INSERT IGNORE INTO {sql.Substring(12)}";
        }

        private static ConcurrentDictionary<Type, List<string>> _ignoreInsertColumns =
            new ConcurrentDictionary<Type, List<string>>();

        protected override long RawExecuteIdentity()
        {
            var sql = this.ToSql();
            if (string.IsNullOrEmpty(sql)) return 0;

            sql = string.Concat(sql, "; SELECT LAST_INSERT_ID();");
            var before = new Aop.CurdBeforeEventArgs(_table.Type, _table, Aop.CurdType.Insert, sql, _params);
            _orm.Aop.CurdBeforeHandler?.Invoke(this, before);
            long ret = 0;
            Exception exception = null;
            try
            {
                ret = long.TryParse(
                    string.Concat(_orm.Ado.ExecuteScalar(_connection, _transaction, CommandType.Text, sql,
                        _commandTimeout, _params)), out var trylng)
                    ? trylng
                    : 0;
            }
            catch (Exception ex)
            {
                exception = ex;
                throw;
            }
            finally
            {
                var after = new Aop.CurdAfterEventArgs(before, exception, ret);
                _orm.Aop.CurdAfterHandler?.Invoke(this, after);
            }

            return ret;
        }

        protected override List<T1> RawExecuteInserted()
        {
            var sql = this.ToSql();
            if (string.IsNullOrEmpty(sql)) return new List<T1>();

            var sb = new StringBuilder();
            sb.Append(sql).Append(" RETURNING ");

            var colidx = 0;
            foreach (var col in _table.Columns.Values)
            {
                if (colidx > 0) sb.Append(", ");
                sb.Append(_commonUtils.RereadColumn(col, _commonUtils.QuoteSqlName(col.Attribute.Name))).Append(" as ")
                    .Append(_commonUtils.QuoteSqlName(col.CsName));
                ++colidx;
            }

            sql = sb.ToString();
            var before = new Aop.CurdBeforeEventArgs(_table.Type, _table, Aop.CurdType.Insert, sql, _params);
            _orm.Aop.CurdBeforeHandler?.Invoke(this, before);
            var ret = new List<T1>();
            Exception exception = null;
            try
            {
                ret = _orm.Ado.Query<T1>(_table.TypeLazy ?? _table.Type, _connection, _transaction, CommandType.Text,
                    sql, _commandTimeout, _params);
            }
            catch (Exception ex)
            {
                exception = ex;
                throw;
            }
            finally
            {
                var after = new Aop.CurdAfterEventArgs(before, exception, ret);
                _orm.Aop.CurdAfterHandler?.Invoke(this, after);
            }

            return ret;
        }

#if net40
#else
        public override Task<int> ExecuteAffrowsAsync(CancellationToken cancellationToken = default) =>
            base.SplitExecuteAffrowsAsync(_batchValuesLimit > 0 ? _batchValuesLimit : 5000,
                _batchParameterLimit > 0 ? _batchParameterLimit : 3000, cancellationToken);

        public override Task<long> ExecuteIdentityAsync(CancellationToken cancellationToken = default) =>
            base.SplitExecuteIdentityAsync(_batchValuesLimit > 0 ? _batchValuesLimit : 5000,
                _batchParameterLimit > 0 ? _batchParameterLimit : 3000, cancellationToken);

        public override Task<List<T1>> ExecuteInsertedAsync(CancellationToken cancellationToken = default) =>
            base.SplitExecuteInsertedAsync(_batchValuesLimit > 0 ? _batchValuesLimit : 5000,
                _batchParameterLimit > 0 ? _batchParameterLimit : 3000, cancellationToken);

        protected override async Task<long> RawExecuteIdentityAsync(CancellationToken cancellationToken = default)
        {
            var sql = this.ToSql();
            if (string.IsNullOrEmpty(sql)) return 0;

            sql = string.Concat(sql, "; SELECT LAST_INSERT_ID();");
            var before = new Aop.CurdBeforeEventArgs(_table.Type, _table, Aop.CurdType.Insert, sql, _params);
            _orm.Aop.CurdBeforeHandler?.Invoke(this, before);
            long ret = 0;
            Exception exception = null;
            try
            {
                ret = long.TryParse(
                    string.Concat(await _orm.Ado.ExecuteScalarAsync(_connection, _transaction, CommandType.Text, sql,
                        _commandTimeout, _params, cancellationToken)), out var trylng)
                    ? trylng
                    : 0;
            }
            catch (Exception ex)
            {
                exception = ex;
                throw;
            }
            finally
            {
                var after = new Aop.CurdAfterEventArgs(before, exception, ret);
                _orm.Aop.CurdAfterHandler?.Invoke(this, after);
            }

            return ret;
        }

        protected override async Task<List<T1>> RawExecuteInsertedAsync(CancellationToken cancellationToken = default)
        {
            var sql = this.ToSql();
            if (string.IsNullOrEmpty(sql)) return new List<T1>();

            var sb = new StringBuilder();
            sb.Append(sql).Append(" RETURNING ");

            var colidx = 0;
            foreach (var col in _table.Columns.Values)
            {
                if (colidx > 0) sb.Append(", ");
                sb.Append(_commonUtils.RereadColumn(col, _commonUtils.QuoteSqlName(col.Attribute.Name))).Append(" as ")
                    .Append(_commonUtils.QuoteSqlName(col.CsName));
                ++colidx;
            }

            sql = sb.ToString();
            var before = new Aop.CurdBeforeEventArgs(_table.Type, _table, Aop.CurdType.Insert, sql, _params);
            _orm.Aop.CurdBeforeHandler?.Invoke(this, before);
            var ret = new List<T1>();
            Exception exception = null;
            try
            {
                ret = await _orm.Ado.QueryAsync<T1>(_table.TypeLazy ?? _table.Type, _connection, _transaction,
                    CommandType.Text, sql, _commandTimeout, _params, cancellationToken);
            }
            catch (Exception ex)
            {
                exception = ex;
                throw;
            }
            finally
            {
                var after = new Aop.CurdAfterEventArgs(before, exception, ret);
                _orm.Aop.CurdAfterHandler?.Invoke(this, after);
            }

            return ret;
        }
#endif
    }
}